<!DOCTYPE html>
<html>
<head>
<style>
#container {
  position: absolute;
  width: 200px;
  height: 200px;
  overflow: scroll;
}
#image {
  width: 100px;
  height: 100px;
  margin: 100px;
  background: blue;
  display: inline-block;
}
#cursor {
  position: absolute;
  left: 0;
  top: 0;
  width: 10px;
  height: 10px;
  background: red;
}
</style>
</head>
<body>
<div id='container'>
  <div style="position:relative">
    <div id='image'></div>
    <div id='cursor'></div>
  </div>
</div>
</body>
<script>
var x = image.getBoundingClientRect();
cursor.style.left = '10px';
</script>
</html>
